/**
 * Created by jiachenpan on 16/11/18.
 */

export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if (('' + time).length === 10) time = parseInt(time) * 1000
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

export function formatTime(time, option) {
  time = +time * 1000
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function() {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function(...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}

// 月份
export const periodList = [
  {
    label: '1月份',
    value: 1
  },
  {
    label: '2月份',
    value: 2
  },
  {
    label: '3月份',
    value: 3
  },
  {
    label: '4月份',
    value: 4
  },
  {
    label: '5月份',
    value: 5
  },
  {
    label: '6月份',
    value: 6
  },
  {
    label: '7月份',
    value: 7
  },
  {
    label: '8月份',
    value: 8
  },
  {
    label: '9月份',
    value: 9
  },
  {
    label: '10月份',
    value: 10
  },
  {
    label: '11月份',
    value: 11
  },
  {
    label: '12月份',
    value: 12
  }
]

// 年份
export function getYear() {
  const arr = []
  const d = new Date()
  for (var i = 0; i < 5; i++) {
    arr.push({ label: d.getFullYear() - i, value: d.getFullYear() - i })
  }

  return arr
}

// 获取年月
export function getYearMonth(d) {
  var t = d || new Date()
  const a = t.toLocaleDateString().split('/')
  const b = a.slice(0, a.length - 1)
  if (b[1] < 10) {
    b[1] = '0' + b[1]
  }
  return b.join('-')
}

// 年份
export function getYearYYYY(t) {
  var d = t || new Date()
  return d.getFullYear().toString()
}

export function getYearYYYYSND(t) {
  var d = t || new Date()
  return (d.getFullYear() - 1).toString()
}

// 货币三位分隔过滤器
export function MoneyFormat(money) {
  if (money && money != null) {
    money = String(money)
    var left = money.split('.')[0]
    var temp = left.split('').reverse().join('').match(/(\d{1,3})/g)
    return (Number(money) < 0 ? '-' : '') + temp.join(',').split('').reverse().join('')
  } else if (money === 0) { // 注意===在这里的使用，如果传入的money为0,if中会将其判定为boolean类型，故而要另外做===判断
    return '0'
  } else {
    return ''
  }
}

export function ZeroIsNotDisplay(num, n) {
  num = num.toFixed(n)
  if (Number(num) <= 0) {
    num = ''
  }
  return num
}
